[lworld] RFR: 8373259: [lworld] Remove BufferedValueClosure

[Stefan Karlsson]

BufferedValueClosure is dead code in the lworld branch. I propose that we remove it.

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Commit messages:
 - 8373259: [lworld] Remove BufferedValueClosure

Changes: https://git.openjdk.org/valhalla/pull/1776/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1776&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373259
  Stats: 26 lines in 3 files changed: 0 ins; 24 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/1776.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1776/head:pull/1776

PR: https://git.openjdk.org/valhalla/pull/1776